Electrode



Aug. 3, 1937. E. J. voN HENKE ELECTRODE Filed May 9, 1936 aff mvENToR ATTORNEYS Patented Aug. 3, 1937 UNITED STATES PATENT OFFICE ELECTRODE Application May 9, 1936, Serial No. 78,743

1 Claim.

This invention relates to a novel and improved form of electrode, the novel features of which will be best understood from the following description and the annexed drawing, in which I have shown selected embodiments of the invention and in which:

Fig. 1 is a perspective view of a welding machine with which the invention may be used;

Fig. 2 is a longitudinal section through the electrode;

Fig. 3 is a view similar to Fig. 2 but on a smaller scale and showing a diierent embodiment of the invention;

Fig. l is a View on an enlarged scale showing l5 another embodiment of the invention.

The construction of the electrode forming the subject matter of this application is one designed primarily to permit ready cooling of the electrode and particularly of its tip, and also to permit ready change from one form of electrode to another, according to the requirements of the work being performed.

The apparatus shown in Fig. l comprises horns i and i to which are secured electrodes 3 and 4 Wliich are brought into contact with opposite l sides oi2 the work, either by a motor drive or by a treadle t, all in a manner known in the art. Each electrode according to my invention,

is provided with a head l to which a cooling 3@ fluid, such as water, may be supplied through hose d.

ltelemlng not? suore particularly to Fig. 2, it will be seen that the head is provided with a chamber Sl extending lengthwise thereof, and that this chamber is in communication with the .hose l tlnough two circulation connections it and l l. The Wall oi the chamber between these connections is threaded as shown, and a tting threaded engagement with this part ol the wall, serving" as a partition to divide the chamber, extendine' across the chamber between the two connections and il.

Secured to the head is o. body lfd tubular in i'orin and having a central bore M forming 45 substantial continuation oi? the chamber when the parts are secured together. The body may be secured to the head as by a sleeve lll threaded ou the head and engaging a Wire i6 received in a peripheral groove in the outer surface or the 5o body. .el washer l'l may be interposed between the 'body and the head toinsure a tight ht therebetween.

The end ol the bore i4 remote from the chamber is enlarged as indicated at ill, and is threaded.

55 interiorly es shownp to engage corresponding .threads on the outer surface of a welding tip I9.

Secured to the iitting I2 is a tube 20, preferably arranged concentrically in the bore I4 and spaced from the walls thereof. One end of the tube is secured to the fitting as indicated, which may be done by sweating or any other suitable means, and its opposite end extends well into the tip I9, being disposed in a recess 2l in the tip but spaced from the walls of that recess.

By the above arrangement it will be seen that water or other cooling fluid may enter through the connection l0 and thus pass through the tube directly to the welding tip I9 and then return through the bore I4 on the outside of the tube 20 and out through the connection Il. If preferred, this direction of flow may be reversed. but preferably the connection I0 is used as the intake and the connection Il as the outlet.

It will be seen that the cooling fluid is supplied directly to the Welding tip through the tube 20 and that the heat transmitted to the fluid may be easily and readily conducted away by the contact oi the returning huid with the wall of the bore it in the body i3. Moreover, by placing the tip :inside the bore, the cooling fluid comes directly in contact with. a large area of the tip and thus the heat will be rapidly conducted away directly by the cooling huid. Likewise, the Welding tip has an extended thermal contact with the body through the threaded connection therewith. and heat te rapidly conducted to the body from the tip through this connection.

The arrangement oi the fitting having threaded engagement with the chamber wall between the two connections lll and il is of advantage particularly in connection with the detachable connection between the head and the body. Whenever it is desired to change the character ci the electrode, ior cumple when the character oi? the worl: being Welded is changed, the body can be readily disconnected by loosening the sleeve lli and then the tum may be taken out by turning it the fitting to which it is secured. Then e, new body may be supplied to the head having a tube With a fitting adapted for use with. that body. l'he parts are assembled by placing the new tube with its fitting in place first and then the body may he connected to the head. @n the other hand, where the body of the electrede has some such shape as that shown at 22 in Fig. 3, the tube 23 with its fitting l2 may be assembled together with the body. The fitting is secured in place first and then the body is secured to the head.

n FigD i is shown a modiiied form of head 21 inwbiohtbeconnections iland Il aredisposed onebehind-the other or transversely o! thechamberl' insteadoiienetbwisethereoi'. Otherwise. this iorm of tbe invention follows closely that s aireadydescribedsndturtherdetaildeecription thereof is deemed unnecessary.

. While I bave shown the invention as embodied inspecincforms, itistobeunderstoodthatvariisebanseaindetaiismaybemadewitbout departinl from the scope of theinvention, 'as deiinedbytbc sppendedelaim.

A welding electrode abead bavineaohamberthereinandtwocirculationconnections communicating witb said chamber at spacedpoints.atubularbodysecured to saidhead and having a central bore communicating atone end with said chamber, a welding tip secured to the body at tbe other end of said bore, s. nttinz threaded to the wall of said chamber between said connections and forming a partition across tbe chamber, and a tube disposed within said bore and spaced from the wall thereof, said tube beine secured at one end to said iitting in line with a hole extending through said ntting, the other end oi tbe tube extending adjacent said tip but spaced therefrom.

IDHUND J. VOI HEERE. 

